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https://github.com/zeromq/libzmq.git
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05d908492d
Sockets may now be migrated between OS threads; sockets may not be used by more than one thread at any time. To migrate a socket to another thread the caller must ensure that a full memory barrier is called before using the socket from the target thread. The new zmq_close() semantics implement the behaviour discussed at: http://lists.zeromq.org/pipermail/zeromq-dev/2010-July/004244.html Specifically, zmq_close() is now deterministic and while it still returns immediately, it does not discard any data that may still be queued for sending. Further, zmq_term() will now block until all outstanding data has been sent. TODO: Many bugs have been introduced, needs testing. Further, SO_LINGER or an equivalent mechanism (possibly a configurable timeout to zmq_term()) needs to be implemented.
155 lines
3.3 KiB
C++
155 lines
3.3 KiB
C++
/*
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Copyright (c) 2007-2010 iMatix Corporation
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This file is part of 0MQ.
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0MQ is free software; you can redistribute it and/or modify it under
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the terms of the Lesser GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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Lesser GNU General Public License for more details.
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You should have received a copy of the Lesser GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "../include/zmq.h"
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#include "pair.hpp"
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#include "err.hpp"
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#include "pipe.hpp"
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zmq::pair_t::pair_t (class ctx_t *parent_, uint32_t slot_) :
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socket_base_t (parent_, slot_),
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inpipe (NULL),
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outpipe (NULL),
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inpipe_alive (false),
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outpipe_alive (false)
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{
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options.requires_in = true;
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options.requires_out = true;
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}
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zmq::pair_t::~pair_t ()
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{
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zmq_assert (!inpipe);
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zmq_assert (!outpipe);
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}
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void zmq::pair_t::xattach_pipes (class reader_t *inpipe_,
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class writer_t *outpipe_, const blob_t &peer_identity_)
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{
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zmq_assert (!inpipe && !outpipe);
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inpipe = inpipe_;
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inpipe_alive = true;
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inpipe->set_event_sink (this);
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outpipe = outpipe_;
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outpipe_alive = true;
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outpipe->set_event_sink (this);
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}
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void zmq::pair_t::terminated (class reader_t *pipe_)
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{
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zmq_assert (pipe_ == inpipe);
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inpipe = NULL;
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inpipe_alive = false;
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}
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void zmq::pair_t::terminated (class writer_t *pipe_)
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{
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zmq_assert (pipe_ == outpipe);
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outpipe = NULL;
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outpipe_alive = false;
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}
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void zmq::pair_t::xterm_pipes ()
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{
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if (inpipe)
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inpipe->terminate ();
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if (outpipe)
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outpipe->terminate ();
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}
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bool zmq::pair_t::xhas_pipes ()
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{
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return inpipe != NULL || outpipe != NULL;
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}
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void zmq::pair_t::activated (class reader_t *pipe_)
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{
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zmq_assert (!inpipe_alive);
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inpipe_alive = true;
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}
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void zmq::pair_t::activated (class writer_t *pipe_)
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{
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zmq_assert (!outpipe_alive);
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outpipe_alive = true;
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}
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int zmq::pair_t::xsend (zmq_msg_t *msg_, int flags_)
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{
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if (outpipe == NULL || !outpipe_alive) {
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errno = EAGAIN;
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return -1;
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}
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if (!outpipe->write (msg_)) {
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outpipe_alive = false;
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errno = EAGAIN;
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return -1;
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}
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if (!(flags_ & ZMQ_SNDMORE))
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outpipe->flush ();
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// Detach the original message from the data buffer.
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int rc = zmq_msg_init (msg_);
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zmq_assert (rc == 0);
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return 0;
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}
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int zmq::pair_t::xrecv (zmq_msg_t *msg_, int flags_)
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{
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// Deallocate old content of the message.
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zmq_msg_close (msg_);
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if (!inpipe_alive || !inpipe || !inpipe->read (msg_)) {
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// No message is available.
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inpipe_alive = false;
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// Initialise the output parameter to be a 0-byte message.
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zmq_msg_init (msg_);
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errno = EAGAIN;
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return -1;
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}
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return 0;
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}
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bool zmq::pair_t::xhas_in ()
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{
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if (!inpipe || !inpipe_alive)
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return false;
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inpipe_alive = inpipe->check_read ();
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return inpipe_alive;
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}
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bool zmq::pair_t::xhas_out ()
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{
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if (!outpipe || !outpipe_alive)
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return false;
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outpipe_alive = outpipe->check_write ();
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return outpipe_alive;
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}
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